Gd2O3/TREO (% min.) | 99.999 | 99.99 | 99.9 | 99 |
TREO (% min.) | 45 | 45 | 45 | 45 |
Rare Earth Impurities | ppm max. | ppm max. | % max. | % max. |
La2O3/TREO CeO2/TREO Pr6O11/TREO Nd2O3/TREO Sm2O3/TREO Eu2O3/TREO Tb4O7/TREO Dy2O3/TREO Ho2O3/TREO Er2O3/TREO Tm2O3/TREO Yb2O3/TREO Lu2O3/TREO Y2O3/TREO | 1 1 1 1 5 5 5 1 1 1 1 1 1 2 | 5 10 10 10 30 30 20 5 5 5 5 5 5 5 | 0.005 0.005 0.005 0.005 0.02 0.05 0.01 0.01 0.005 0.005 0.001 0.001 0.001 0.03 | 0.01 0.01 0.01 0.01 0.1 0.1 0.05 0.05 0.05 0.01 0.01 0.01 0.01 0.05 |
Non-Rare Earth Impurities | ppm max. | ppm max. | % max. | % max. |
Fe2O3 SiO2 CaO CuO PbO NiO | 3 50 50 3 3 3 | 10 50 50 10 10 10 | 0.003 0.015 0.05 0.001 0.001 0.001 | 0.005 0.03 0.05 0.003 0.003 0.005 |